Radio receiving system



Dec. 18, 1934. G|DDEN5 1,984,408

RADIO RECEIVING SYSTEM Filed May 19, 1932 mac ,0 ATTORNEY Patented Dec. 18, 1934 UNITED STATES mmo RECEIVING SYSTEM Paul K. Gidde'ns'," Kansas City, Mo., assignor to Pagenhart Research Corporation, Kansas City,

Mo., a corporation of Missouri Application May 19, 1932', Serial No.612,244

3 Claims. (01.178-44) My invention relates to improvements in radio receiving systems. v V

One of the objects of my invention is to provide a'- novel antenna system adapted for'use with or as a part of a usual radio receiving set, which is simple, greatly increases the strength of signals given out, and improves the selectivity and tonal qualities of the set with which it is employed, and which is efliciently used for wave lengths and frequencies which widely vary.

The novel features of my invention are hereinafter fullydescribed and claimed. V

In the accompanying drawing, which illustrates my invention, I

Fig. 1 is a diagrammatic view of a circuit embodying one form of my invention.

Fig. 2 is a diagrammatic view of a circuit embodying another form-of my invention. 7

Fig. 3 is a diagrammatic view of a circuit-embodying still another form of my'invention.

Fig. 4 is a diagrammatic view of one form of my antenna circuit in-whichthe primary andv secondary induction coil windings are alined and one above the other. i 1

Referring to Figs. '1 to 4, the circuits shown are alikein all of the forms,-exoepting as to the output connections thereof respectively. In each form of my invention the following described parts are embodied. i

1 designates a usual antenna which is connected in seriesby an aerial'connection 2 with one end, being the upper end, as shown, of a primary winding or inductance 3. 4 designates an element comprising a secondary winding or inductance which is inductively'related to the primary winding 3 In Figs. 1, 2 and 3, the windings 3 and 4 are shown in the conventional manner, disposed side by side, while in Fig. 4, the windings are shown alined with the primary winding 3 above the secondary winding 4, as they are commonly disposed in ordinary types of induction coils. In both forms, however, the windings are inductively related in a like manner. 7 1

The lower end of the 'secondary'winding 4 is connected to ground by'a conductor 5. Conducting means, including an element comprising a condenser 6, connects the lower end of the primary winding 3 with'such end, being the upper end, as shown, of the secondary winding 4 that a received impulsepassing downwardly through the aerial connection 2 and the primary winding 3, will also pass downwardly through the secondary winding 4, as indicated by the arrows respectivelyat the left of the .windings 3 and 4.v

the latter with energy.

The conducting means, which includes the condenserfi, includes a conductor '7 connected at one end to the lower end of the primary winding 3, its other end being connected to the rotor, preferably, of the condenser 6, which, as shown may be a variable'one, the stator of which is connected by a conductor 8, as shown, with the upper end of the secondary winding 4. In each form of my invention,- as shown in Figs. 1 to '4, the windings 3 and 4 are verticallydisposed, and the upperend of the primary winding 3, being connected to the aerial, is the high potential end. The lower and low potential end of the primary winding 3 is connected to the upper end of the secondary winding 4, which end, due to the inductive relationshipbetween the windings, is the high potential end of the secondary winding 4, the lower end of which, being nearest to ground, is-the low potential end thereof.

Conducting means, including an element comprising a variable condenser 9 is shunted across the secondary winding 4, said conducting means including a conductor 10, is connected to the conductor 8 and tothestator of the condenser 9 the rotor of which is connected by a conductor 11 to the conductor 5. v

A second circuit to be supplied by the antenna circuit, just described, comprises a primary winding 12 one end, the lower one as shown being connected by a conductor 13 with the grounded conductor .5.

Inductively related to the primary winding 12'is a secondary winding 14, one end,

the lower one, as shown, being connected to the grounded conductor 5. The upper end'of the winding 14 is connected by aconductor 15 to grid 16 of a radio tube 17.

The tube 1'? is of the usual radio vacuum tube provided with the usual filament 18 and plate 19.

Conducting means including a variable cndenser 2 0 connected by a conductor, 21 to the grounded conductor 5, andby a conductor 22 to antenna circuit shown in Fig. 4 may be used in connection with the second circuit for supplying The condensers 6 and 9 preferably have their rotors oscillative with each other, as indicated by the dotted line connecting them in the different figures, thereby requiring but one controlling member for the antenna circuit; t

-' Referring to Fig. 1, the output connection for conveying'energy from the antenna circuit to the second circuit comprises conducting means including a variable condenser 23 which is connected by a conductor 24 to the conductor 8, said condenser 23 being connected by a conductor 25 to the upper end or" the primary winding 12. The output connection just described is thus connected capacitively with the condensers 6 and 9.

In Fig. 2, the output connection shown includes three small windings 26, 27 and 28. The winding 26 is disposed closely adjacent to the upper portion of the secondary winding 4 so as to beincluctively related thereto. One end of the winding 26 is connected by a conductor 29 toa conductor 30 connected to the upper end of the pri: mary winding 12 of the second circuit.

The windings 2'7 and 28 are respectively capacitively related to the condensers 6 and 9, preterably by respectively encircling-and-being spaced from and insulated from two conductive cores 31 and 32 respectively connected by conductors 33 and 34 to the conductor 8.

Conductors 35 and 36 respectively connect the windings 2'7 and 28 with the conductor 30.

The conductors 29, 35 and 36 are respectively provided with circuit closers 3'7, 38 and 39, by which these branches of the output connection may be separately or simultaneously employed.

In the form shown in Fig. 3, a winding 40 inductively related to the upper portion of the secondary winding 4 is connected by a conductor 41 to the upper end of the primary winding 12, and forms with said conductor the output connection.

In Fig. 4, the antenna circuit shown, corresponds to the antenna circuits in Figs. 1, 2 and 3, excepting for the disposition, as has been stated, of thegprimary winding 3 above and alined with the secondary winding 4, and with the exception of the output connection. The latter comprises, in Fig. 4 a winding 42 capacitively related to the condenser 9 by encircling and being spaced from and insulated from a conductive core 43 connected .by. a conductor 44 to the stator of the-condenser 9. Connected to the winding- 42 is a conductor 45 adapted to be connected to the upper end of the primary winding 12 of the second circuit.

As. in the other forms, the form shown in Fig. 4 has the lower end of the primary winding 3 connected by a conductor 7 to the rotor of the condenser 6, the. stator of which is connected by a conductor :8 to the upper. end of the secondary winding 4, the lower endof which is connected by. a conductor 5 to ground. The condenser 9 is connected at its stator by a conductor 10 to the conductor 8, and the rotor of the condenser -9 is connected by a conductor 11 to the conductor 5, asin the other forms shown.

In the operation of each form of my invention, impulses traveling in one direction throughthe windings 3 and 4, as downwardly as indicated by the arrows at the left of the windings 3 and 4, will induce impulses which will travel in the opposite directions through the secondary winding 4, or upwardly as indicated by the arrow at the right of the winding 4.

This reversal of phase of the secondary winding 4 effects a notable increase in the strength of the signals discharged into the receiving set through the output connections, as theparts'23, 24 and 25, in Fig. 1; the elements-27, .33, 35, 38 and 30, when the switch 33 is closed,. Fig. 2,; the elements 26, 29, 3;7and 30, Fig. 2, when the switch 37 is closed the elements 28, 34, 36, 39 and 30, Fig.2, when the switch39 isclosed; the elements electrical;

40 and 41, Fig. 3; and the elements 42, 45 and 44, Fig. 4.

In Fig. 1, an impulse traveling downwardly from the aerial connection 2 will pass downwardly through the primary coil 3 thence through the conductor 7, condenser 6 and conductor 8 to the upper end of the secondary winding 4 through which the impulse will tend to travel downwardly, but will be opposed by the induced impulse tending to travel upwardly in the winding 4.

This will direct a large amount of the energy received to the output connection and it will pass therethrough by the conductors 24 and 25 and condenser .23 .to and through the primary windving 12, and thence to ground through the conductorl5. The impulses induced in the secondary winding 14 will pass upwardly therethrough to the grid 16 through the conductor 15. The two condensers 9 and 20 which respectively are shunted across the secondary windings 4 and 14, respectively, .attune the two circuits in whichsaicl windings are respectively located.

The impulses passing downwardly from the aerial connection 2 the other forms ,-Figs. '2, 3 and 4, will travel, .as has been described with reference to the form shown in Fig. 1, through the antenna circuit and through the receiving set circuit, with the exception as to the output connections in the several forms.

In Fig. 2, the windings 26, 27 and .28 are respectively influentially related to the winding 4 and the condensers -6 and 9. The winding .26 is inductively related to the 4, and the windings 27 and 28 are capacitivelyrelated, through the conductor 33 and core 31 and the conductor 34 .and core 32 respectively with the condensers 6 ands. Thus the impulses received in the coils 26, 27 and 28 will, when the switches and are l sed ra to t prima winding 12 through the paths connected therewith, .as hereinbeiore. described.

I Fi he impul e ndu d t e winding i -W l ra u the con u t to. the winding 14.

34th m ulsesr ce ve in e wind 42, by its capacitive relationship to the :con-

denser 9 through the, core43vand' the-conductor 44, will travel through the conductor 45 to the input of the receiving set, asthe primary winding 12 when the-conductor 451s connected thereto, as are the conductors 2 5, 30; and 41, in Figs. 2 nd3 s ctiv The. term in fluentially related,-as herein'em- .ployed, is intended to designate generically the herein as inductively and capacitivelyrelated.

In each forn of my invention, shown in Figs. 1 to 4, the output connection of theaantennaacircuit is influentially related capacitiyely or inductively, to at or ion of; t e circuitwhich includes the high potential end of the secondary winding 4. This construction, subjects the output connection to the direct action of the received impulses, in addition to the. inductive .ac-

tion thereof. By non-grounding the primary winding 3, by the-insertion between it and the secondary windingv -4 of; the condenser. 6, the direct action. of the received impulses upon the output onnect-ion isgreatly. augmented, and the combined effectof; the direct-and the inductive actions upon. the output connection is. much more pronounced thanwould be-the inductive action. alone.

By. shunting. the variable capacity coupling .9

elat on h pe f cally "des nated across the secondary winding 4, in the different forms of my invention, the secondary circuit thus formed may be made to resonate at the same frequencies as the primary circuit tuned by the variable capacity coupling 6, thus building up the voltage, setting up a high rejection to undesired frequencies and greatly increasing selectivity. Shunt tuning of the secondary winding 4 also permits of alining or tracking when the antenna circuit is used in connection with succeeding shunt tuned circuits, enabling the use of a single tuning control of the multiple tuned circuits.

By having the output connection capacitively related to one of the variable capacity couplings 6 or 9, as shown in Figs. 1 and 2, or inductively related to the tuned secondary winding or conductor 4, as shown in Figs. 2 and 3, the antenna circuit may be used as an auxiliary to a shunt tuned completed receiving set already in use, and may have its output connection coupled directly to the intake terminal of such set.

This application is a continuation in part of my application No. 463,090, filed June 23, 1930, for an improvement in radio antenna systems.

I do not limit my invention to the structures shown and described, as many other modifications, within the scope of the appended claims, may be made without departing from the spirit of my invention.

What I claim is:

1. In a radio antenna circuit, anaerial conductor, a primary inductance connected at one end to said aerial conductor, a variable condenser connected to the'otherend of said primary inductance, a second variable condenser connected to ground and in series with said primary inductance through said first named condenser, a. secondary inductance inductively related to said primary inductance and shunted across said second condenser only, and an output capacity coupling connected to said first named condenser.

2. In a radio antenna circuit, an aerial conductor, a primary inductance connected at one end tosaid aerial conductor, a variable condenser connected tothe other end of said primary inductance, a second variable condenser connected to ground and in series with said primary inductance through said first named condenser, a secondary inductance inductively related to said primary inductance and shunted across said secondary condenser only, and an output connection inductively related to said secondary inductance. v

3. In a radio antenna circuit, an aerial conductor, a primary inductance connected at one end to said aerial conductor, a variable condenser connected to the other end of said primary inductance, a second variable condenser connected to ground and in series with said primary inductance through said first named condenser, a secondary inductance inductively related to said primary inductance and shunted across said secondary condenser only, and an output capacity coupling connected to said second named condenser. PAUL K. GIDDENS. 

